<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      .header {
        width: 100%;
        height: 100px;
        background-color: aqua;
      }
      .left {
        position: fixed;
        width: 50%;
        top: 20px;
        left: 0px;
        background: indianred;
      }
      .right {
        width: 50%;
        top: 20px;
        right: 0px;
        background: hotpink;
      }
        .header {
            width: 100%;
            height: 100px;
            background-color: aqua;
        }
        
        .left {
            position: fixed;
            width: 50%;
            top: 20px;
            left: 0px;
        }
        
        .right {
            width: 50%;
            top: 20px;
            right: 0px;
        }
    </style>
</head>

<body>
  </head>
  <body>
    <h1>猪蹄</h1>

    <h2>鸡爪</h2>

    <div class="header">头部</div>
    <div class="left">左侧</div>
    <div class="right">右侧</div>

    <div>我是一个有梦想的的人</div>
    <div>梦想靠努力实现</div>
</body>

</html>

    <h2>白马义从1</h2>
    <h2>白马义从2</h2>
    <h2>白马义从3</h2>
    <h2>白马义从4</h2>

    <h2>zxt 是个大大</h2>

  </body>
</html>

